.tree-subtree {
  padding-left: 15px;
  margin-left: 0px;
}

.tree-collapsible .tree-subtree:not(.tree-subtree-visible) {
    display: none;
}

.tree-collapsible .tree-collapsible-content:not(.tree-collapsible-content-visible) {
    display: none;
}

.tree-caret {
    font-size: var(--font-small);
    cursor: pointer;
}

.tree-caret:before {
    content: "\25B6";
    display: inline-block;
    margin-right: 6px;
}

.tree-caret-down:before {
    -ms-transform: rotate(90deg); /* IE 9 */
    -webkit-transform: rotate(90deg); /* Safari */
    transform: rotate(90deg);
}

.tree-item {
    border-radius: 5px;
    transition: all 0.1s linear;
    line-height: initial;
}

.tree-collapsible-content {
    display: flex;
    flex-direction: column;
}

.tree > li,
.tree-subtree > li {
    list-style-type: none;
    margin: 6px 0 6px 10px;
    position: relative;
}

.tree > li:before,
.tree > li:after,
.tree-subtree > li:before,
.tree-subtree > li:after {
    content: "";
    position: absolute;
    left: -15px;
    width: 15px;
    border-left: 1px solid var(--divider-color-1);
}

.tree > li:before,
.tree-subtree > li:before {
    top: -6px;
    border-bottom: 1px solid var(--divider-color-1);
    height: 22px;
}

.tree > li:after,
.tree-subtree > li:after {
    top: 16px;
    border-top: 1px solid var(--divider-color-1);
    height: 100%;
}

.tree > li:last-child:after,
.tree-subtree > li:last-child:after {
    display: none;
}

.tree .tree-item {
    display: block;
    border: 1px solid var(--divider-color-1);
    padding: 5px;
    color: var(--sample-heading-color);
    text-decoration: none;
}

.tree .tree-item:hover,
.tree .tree-item:focus,
.tree .tree-item:hover + .tree-subtree .tree-item,
.tree .tree-item:focus + .tree-subtree .tree-item {
    background: var(--containers-background-contrast);
    border: 1px solid var(--divider-color-2);
}

.tree .tree-item:hover + .tree-subtree li:after,
.tree .tree-item:focus + .tree-subtree li:after,
.tree .tree-item:hover + .tree-subtree li:before,
.tree .tree-item:focus + .tree-subtree li:before {
    border-color: var(--divider-color-2);
}